Display rack



FIG. 1 is a front perspective view of a display rack in an opened display position, showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a side elevational view taken from the left of FIG. 1;

FIG. 5 is a rear elevational view; and

FIG. 6 is a rear perspective view in a closed position. 

The ornamental design for a display rack, substantially as shown and described. 